"He's always seemed to have a problem with authority," she said, including having issues with parents, bosses, and police.

Mike Campbell, who was childhood friends with Bourque until the two drifted apart, said he recently became reacquainted with his friend after the death of Campbell's father.

He said Bourque had recently quit his job at a grocery store and was living in a trailer park.

Campbell said Bourque came to see him one afternoon when other friends were over.

"We were just sitting in the garage drinking a little bit of whisky, listening to some Black Sabbath, and having a good time. Then he got up. 'I should get home before I pass out,' is what he said. 'I'm going to go.'

"I told him, 'Get hold of me later.' And he was like, 'I don't know. You take care, Mike. You have a good life.'"

Campbell told Business Insider he was "kind of weirded out" by Bourque's behaviour.

Bourque's final post Wednesday was lyrics from the Megadeth song Hook In Mouth. Two friends commented on the post.

"F--- buddy," one wrote, also writing on his Facebook page that he wished he could talk to Bourque, "convince him to stop."

"You knew this wasn't the answer," a second friend wrote on Bourque's status.